Door-lock.



e. H. DUBE.

DOOR LOCK.

APPLICATION HLED Dc.29.1915.

Patented Apr, 3, 1917.

2 SHEETS-SHEET I INVENTOR M, b B

ATTORNEY .WASHINGIDAL n c G. R. DUBE DOOR LOCK.

APPLICATION FILED DEC. 29, 1916.

\ Patented Apr. 3, 1917.

2 SHEETS-SHEET 2 R O T N E V m ATTO R N EY GEORGE R. DUBE, OF NEW IBEDFORD, MASSACHUSETTS.

DOOR-LOCK.

Specification of Letters Patent.

Patented it. a, 1917.

Application filed December 29, 1916. Serial No. 139,624.

To all whom it may concern.

Be it known that I, GEORGE R. DUBI I, a citizen of the United States, residing at New Bedford, in the county of Bristol and State of Massachusetts, have invented new and useful Improvements in Door-Locks, of which the following is a specification.

This invention comprphends the provision of a door lock, primarily designed for use with sliding doors, and embodies a mechanism which necessitates the employment of a peculiarly constructed key to manipulate the same, which fact prohibits the door;

cordance with my invention.

Fig. 2 is a sectional View taken on line 2-2 of Fig. 1.

Fig. 3 is a similar view taken on line 33 of Fig. 1.

Fig. 4 is a rear elevation of the lock casing with the detachable plate removed.

Fig. 5 is an elevation of the key used in connection with the lock mechanism with the parts in normal position.

Fig. 6 is a similar view showing the active position of parts when the key is in use.

Fig 7 is a sectional view through the key.

Fig. 8 is a detail view of the tubular guide.

Referring to the drawings in detail 10 indicates a casing in which the component parts of the lock mechanism are arranged, the casing being of elongated formation, and having an openingat the rear which is adapted to be'closed by means of a plate 11, which is arranged adjacent the body of the car A, when the casing is secured to the latter. The casing is provided with extensions 12 apertured for the reception of suitable fastening means. One side of the casing is provided with a slot 13 through which the hasp 14: enters the casingwhen it is desired to lock the door. As shown the hasp is mounted for pivotal and sliding movement upon a projection extending from an attaching plate 16 carried by the door, the hasp being provided with an elongated slot 17 for the reception of the projection 15. One end of the hasp is notched as at 18 to cooperate with the lock mechanism within the casing in the manner to be presently described.

Arranged within the casing is a sliding bolt 19 having a reduced extremity 20 adapted to be received within the notch 18 of the hasp to hold the latter within the casing when it is desired to lock the door. A stud 21 projects from the opposite end of the casing and is received within the convolutions of the coil spring 22, the opposite end of the spring being seated within a recess in the top wall of the casing, whereby the spring exerts a pressure upon the bolt 19 to normally hold the latter in its extended or active position. The reduced extremity 20 has its side adjacent the slot 17 rounded as at 23 so that when the hasp is introduced into the casing through said slot, the bolt will readily and easily yield to permit the hasp to continue within the casing, until the notch 18 thereof assumes a position immediately beneath the bolt, at which time the latter under the influence of the spring 22 assumes its active position, with its extremity 22 arranged within the notch 18. The door is then effectively locked in closed position.

In order to retract the bolt to effect a release of the door, I provide the bolt with an elongated slot 24, one wall of the slot being inclined as at 25, the inclinationmerging into a shoulder 26 for cooperation with an especiallyconstructed key clearly illustrated in Figs. 5 and 6. The stem 27 of the key is provided with a slot 28 in which is pivoted an actuating element 29 which when in its inactive position lies between the walls of the slot in alinement with the stem of the key. The element 29 is normally held in this position through the 'instrumentality of a sleeve 30 mounted for sliding movement upon the'stem 27 The sleeve is provided with an internal rib 31 which rides within a groove 32 to prevent rotation of the sleeve upon the stem. A spring 33 is associated with the stem and acts upon the sleeve 30 to normally maintain the latter at the limit of its adjustment in one direction, in which position the rib 31 engages the actuating element 29 at one side of the pivot thereof, in a manner tohold the actuating element normally within the slot 28 of the stem. A tube 34: arranged within the casing in alinement with the key-hole opening 35 receives the stem of the key when the latter is inserted through the key-hole opening,

but when the sleeve 30 abuts against the adj acent end of the tube 34, the sleeve is held stationary while the stem of the key is pushed farther through the tube against the tension of the spring 33. During this movement of the stem the actuating element 29 is moved away from the rib 31 and when the stem reaches a predetermined position within the, casing, the actuating element gravitates within the slot 28 we position substantially at right angles to the stem. The tube at is cut away as at 36 to allow for this movement of the actuating element,

When the actuating element assumes the position stated the key is turned in the proper direction to permit the actuating element 29 to enter the slot 24 in the bolt 19. As the element 29 enters the slot in the bolt it is guided by the inclined portion 25 in the proper direction to engage the shoulder '26, whereupon further rotation of the key effects an adjustment of the bolt 19, moving the latter out of engagement from the hasp 14:- It might here be stated that one extremity of the actuating element 29 is curved to accommodate itself to the outline of the inclined portion 24, and to assure its engagement with the shoulder 26. The door is then opened, and by rotating the key in a reverse direction the proper distance, the actuating'element 29 will be removed from within the slot in the bolt. The spring 33 then functions to retract the bolt an appreciable distance from within the tube 34, during which movement of the key the actuating element engages an obstructing block 37, and moved by the latter within the slot 28 in the stem. The key can then be easily removed as will be readily understood. Subsequent to the removal of the key, the

keyhole slot 35 is concealed from view by means of a slide 38 movable within suitable guides 39 secured to the exterior of the casing.

Secured to the wall of the casing opposite the wall provided with the slot 13, is one end of a leaf spring 4C0, the opposite extremity of the springrbeing curved and terminating in close proximity to the slot 13.

In other Words the curved extremity of the spring is disposed in an obstructing position with respect to the hasp, when the latter is tions to project the hasp from within the casing. As hercinabove stated, the hasp is provided with a slot 17 which permits the latter to be projected in the manner stated.

\Vhile it is believed that from the foregoing description the nature and advantages of the invention will be better apparent I desire to have it understood that what is herein shown and described is merely illustrative of the preferred embodiment of the invention to which I do not limit myself and that such changes may be resorted to when desired as fall within the scope of what is claimed.

lVhat is claimed is 1. A lock mechanism for sliding doors embodying a casing, a yieldably supported bolt arranged therein, a hasp carried by the door and having a notch at one end to automatically receive said bolt when the hasp enters the casing, said bolt having a slot therein, a key carrying a stem, and a pivotally mounted actuating element normally disposed in a slot in said stem, and capable of assuming an angular position relative thereto upon insertion of the key within the casing, said actuating element entering the slot in said bolt to retract the latter with the turning of said key, and means disposed in the path of said actuating element to return the latter to normal position with the removal of the key from the casing.

2. A look mechanism for sliding doors embodying a casing, a yieldably supported bolt arranged therein, a hasp carried by the door and having a notch at one end adapted to automatically receive said bolt when the hasp enters the casing, said bolt having a slot therein, a key carrying a stem, a pivotally mounted actuating element, a spring pressed sleeve slidably mounted upon the stem for normally holding the actuating element within a slot in said stem, said actuating element being released from said sleeve and capable of assuming an angular position with respect to the stem upon insertion of the key within the casing, said actuating element entering said slot in the bolt to retract the latter upon turning of the key, and means disposed in the path of said actuating element to automatically return the latter to normal position with the removal of the key from the casing.

In testimony whereof I aflix my signature.

GEORGE R. DUBE.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

. Washington, D. G. 

